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Transcription and Regulation

Transcription and Regulation
Transcription factors are

promoters
proteins which bind to DNA and regulate transcription
CATT boxes
TATA boxes

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Transcription and Regulation
The closed complex at bacterial promoters is

in equilibrium with free RNA polymerase and the promoter
not affected by activator proteins
not affected by promoter mutations
bound more tightly when repressors are present

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Transcription and Regulation
Transcription results in

Okazaki fragments
complementary DNA
an amino acid chain
messenger RNA

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Transcription and Regulation
Each tRNA molecule has a cloverleaf secondary structure consisting of

three stem loops
four stem loops
two stem loops
either (a) or (b)

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Transcription and Regulation
The regions of a gene located at -10 and -35, with respect to the start of transcription, are termed

oriC regions.
Shine Dalgarno sequences.
start codons.
promoters.

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Transcription and Regulation
Promoters for tRNAs are located

downstream from the start codon
both (a) and (b)
none of these
upstream from the start codon

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